package com.sptpc.demo.controller;

import com.sptpc.demo.controller.requests.AddDrinkRequest;
import com.sptpc.demo.controller.requests.ModifyDrinkRequest;
import com.sptpc.demo.model.Drink;
import com.sptpc.demo.service.IDrinkService;
import lombok.extern.slf4j.Slf4j;
import org.joda.money.CurrencyUnit;
import org.joda.money.Money;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.validation.Valid;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("/drink")
public class DrinkController {
    @Autowired
    private IDrinkService drinkService;

    // get /drink/
    //@RequestMapping(value = "/", method = RequestMethod.GET)
    @GetMapping("/")
    public List<Drink> getAll() {
        // mock数据 - 后期从数据库查询
        List<Drink> results = drinkService.getAllDriks();

        return results;
    }

    /**
     * 查询指定饮品
     * get /drink/1
     * get /drink/?id=1
     * 日志 log4j
     */
    @GetMapping("/{id}")
    public Drink getDrink(@PathVariable Integer id) {
        log.info("要查询的饮品id: {}", id);
        // 后期从数据库查询
        Drink drink = Drink.builder().id(1)
                .name("茉莉花茶")
                .price(Money.parse("USD 8.00"))
                .build();
        return drink;
    }

    /**
     * 新建
     * post /drink/ {"name": "奶茶", "price": "8.00", "categoryId": "2"}
     * 传参思路:
     * 1. 直接使用实体类
     * 2. 根据前端参数内容编写TO类
     */
    @PostMapping("/")
    public Drink addNewDrink(@RequestBody @Valid AddDrinkRequest drink,
                             BindingResult bindingResult) {
        if (bindingResult.hasErrors()) {
            for (ObjectError error : bindingResult.getAllErrors()) {
                log.error(error.toString());
            }
            return null;
        } else {
            log.info("新增饮品：{}", drink);
            Drink savedDrink = new Drink();
            BeanUtils.copyProperties(drink, savedDrink);

            drinkService.addNewDrink(savedDrink, drink.getCategoryId());
            return savedDrink;
        }
    }

    /**
     * 修改
     * put /drink/ {"id": "1", “name”: "新名称", "price": "9.00"}
     */
    @PutMapping("/")
    public Drink modifyDrink(@RequestBody ModifyDrinkRequest request) {
        log.info("要修改的饮品：{}", request);

        // 1、通过id查询出饮品
        Drink drink = drinkService.getDrinkById(request.getId());
        // 2、复制前端要修改的属性
        BeanUtils.copyProperties(request, drink);
        // 3、更新数据库
        drinkService.updateDrink(drink);

        return drink;
    }

    /**
     * 删除
     * delete /drink/1
     */
    @DeleteMapping("/{id}")
    public String deleteDrink(@PathVariable Integer id) {
        log.info("要删除的饮品id：{}", id);
        drinkService.deleteDrinkById(id);
        return "删除操作成功";
    }


    /**
     * 文件上传
     * 前端必须使用html form
     * 前端类型必须设置为 multipart/form-data
     */
    @PostMapping(value = "/upload",
            consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    public String uploadFile(MultipartFile file) {
        String dest = "D:/upload/";
        String destFileName = dest + file.getOriginalFilename();
        File destFile = new File(destFileName);
        try {
            file.transferTo(destFile);
        } catch (IOException e) {
            e.printStackTrace();
            return "上传失败";
        }
        return "上传成功";
    }

    /**
     * 批量创建饮品
     *
     */
    @PostMapping(value = "/batch",
            consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    public List<Drink> batchAddNewDrink(MultipartFile file) {
        List<Drink> results = new ArrayList<>();
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    file.getInputStream()));
            String line = "";
            while ((line = reader.readLine())!=null) {
                // 解析一行
                String[] args = line.split(",");
                Drink drink = Drink.builder()
                        .id(Integer.parseInt(args[0]))
                        .name(args[1])
                        .price(Money.of(CurrencyUnit.of("CNY"), Double.parseDouble(args[2])))
                        .build();
                results.add(drink);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return results;
    }


}
